[R] Lattice Plot Ordering?

[Haoda Fu]

Hi,

When I plot multi-panel in R by using lattice package,
the order is always starting from bottom to the top,
e.g., panel 1,2,3,4 will looks like the following,
3,4
1,2

How can I change it to
1,2
3,4
?

many thanks!

Best,
Haoda